package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.config.WebSocketConfiguration;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.service.ShoppingCartService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常(地址簿为空,购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        ShoppingCart shoppingCart=new ShoppingCart();
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList==null&&shoppingCartList.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入1条数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        String address=addressBook.getProvinceName()+
                addressBook.getCityName()+addressBook.getDistrictName()+
                addressBook.getDetail();
        orders.setAddress(address);
        orderMapper.insert(orders);
        List<OrderDetail> orderDetailList=new ArrayList<>();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置关联的订单id
            orderDetailList.add(orderDetail);
        }
        //批量插入订单明细
        orderDetailMapper.insertBatch(orderDetailList);
        //如果下单成功,则清空购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        // 替代微信支付成功后的数据库订单状态更新，直接在这里更新了
        // 根据订单号查询当前用户的该订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(ordersPaymentDTO.getOrderNumber(), userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.TO_BE_CONFIRMED);
        orders.setPayStatus(Orders.PAID);
        orders.setCheckoutTime(LocalDateTime.now());
//        Orders orders = Orders.builder()
//                .id(ordersDB.getId())
//                .status(Orders.TO_BE_CONFIRMED) // 订单状态，待接单
//                .payStatus(Orders.PAID) // 支付状态，已支付
//                .checkoutTime(LocalDateTime.now()) // 更新支付时间
//                .build();

        orderMapper.update(orders);
        return vo;
    }


    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单号查询订单
//        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

        //通过WebSocket实现来单提醒  type orderId content
        Map map = new HashMap<>();
        map.put("type", 1);//消息类型，1表示来单提醒 2表示客户催单
        map.put("orderID", ordersDB.getId());//订单id
        map.put("content", "订单号：" + outTradeNo);
        //通过websocket向客户端浏览器推送消息
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    @Override
    public PageResult pageQuery4User(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 设置分页
        int pageNum=ordersPageQueryDTO.getPage();
        int pageSize=ordersPageQueryDTO.getPageSize();
        PageHelper.startPage(pageNum, pageSize);
        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                System.out.println(orderDetails.size());

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    @Override
    public OrderVO getDetails(Long id) {
        Orders orders= orderMapper.getDetailsById(id);
        orders.setCancelReason(orders.getRejectionReason());
        System.out.println(orders);
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        OrderVO orderVO=new OrderVO();
        //查一下地址
        String address = orders.getAddress();
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void update(Long id) {
        Orders orders=new Orders();
        orders.setId(id);
        orders.setStatus(6);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     * @return
     */
    @Override
    public void repetition(Long id) {
        //根据id查询菜品信息
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        for (OrderDetail orderDetail : orderDetails) {
            ShoppingCartDTO shoppingCartDTO=new ShoppingCartDTO();
            BeanUtils.copyProperties(orderDetail,shoppingCartDTO);
            //添加购物车
            shoppingCartService.add(shoppingCartDTO);
        }
    }

    /**
     * 条件查询
     * @param ordersPageQueryDTO
     * @return
     */

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                orders.setCancelReason(orders.getRejectionReason());
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 查询各个状态的订单
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed=orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed=orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress=orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 确认接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders order = new Orders();
        order.setId(ordersConfirmDTO.getId());
        order.setStatus(Orders.CONFIRMED);
        System.out.println(order);
        orderMapper.updateStatus(order);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersRejectionDTO,order);
        order.setStatus(Orders.CANCELLED);
        order.setCancelTime(LocalDateTime.now());
        order.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        order.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orderMapper.update(order);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders order = new Orders();
        order.setId(id);
        order.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(order);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders order = new Orders();
        order.setStatus(Orders.COMPLETED);
        order.setId(id);
        orderMapper.update(order);
    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //如果处于3,4,5状态,则需要退款
        Long id = ordersCancelDTO.getId();
        Orders order = orderMapper.getDetailsById(id);
        if(order.getStatus()>=3&&order.getStatus()<=5){
            throw new DeletionNotAllowedException("请先退款");
        }
        order.setId(id);
        order.setStatus(Orders.CANCELLED);
        order.setCancelTime(LocalDateTime.now());
        order.setCancelReason(ordersCancelDTO.getCancelReason());
        orderMapper.update(order);
    }

    @Override
    public void reminder(Long id) {
        Orders order = orderMapper.getDetailsById(id);
        if(order==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map=new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号"+order.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
